SHAMROCK: ORC Rating

GPH

562

OSN

547.3

LOA

11.121 m

Displacement

4336 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.739

Medium

0.9752

High

1.1002

Triple Offshore

Low

0.9511

Medium

1.1956

High

1.3359

Boat Specifications

Dimensions

Length overall: 11.121 m
Beam: 3.3 m
Draft: 2.19 m
Displacement: 4336 kg
Crew weight: 690 kg
Wetted surface: 25.67 m²

Sails

Mainsail: 39.04 m²
Genoa: 34.68 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 130.09 m²

Design

Type: J 111
Builder: J BOATS
Designer: A. JOHNSTONE
Year built: 2010
Stability index: 126.8

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,42.6,5.325384,52,5.93,60,6.23,75,6.55,90,6.76,110,6.55,120,6.22,135,5.58,143.3,5.101178,150,4.72
8,40.5,6.299267,52,6.98,60,7.18,75,7.38,90,7.6,110,7.54,120,7.42,135,6.95,146.6,6.204723,150,5.98
10,38.1,6.722283,52,7.43,60,7.61,75,7.75,90,8.01,110,8.1,120,8.05,135,7.74,149.6,7.049164,150,7.02
12,36.9,6.865206,52,7.62,60,7.83,75,8.06,90,8.3,110,8.61,120,8.61,135,8.37,150,7.71,151.2,7.634314
14,36.4,6.95744,52,7.73,60,7.95,75,8.29,90,8.51,110,9.09,120,9.13,135,9.04,148.7,8.29765,150,8.19
16,36.3,7.035365,52,7.8,60,8.04,75,8.44,90,8.78,110,9.51,120,9.7,135,9.84,146.6,9.055542,150,8.73
20,36.4,7.08168,52,7.86,60,8.14,75,8.63,90,9.2,110,10.24,120,11,135,11.85,142.8,11.349228,150,10.44

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.93	6.23	6.55	6.76	6.55	6.22	5.58	4.72
8	6.98	7.18	7.38	7.6	7.54	7.42	6.95	5.98
10	7.43	7.61	7.75	8.01	8.1	8.05	7.74	7.02
12	7.62	7.83	8.06	8.3	8.61	8.61	8.37	7.71
14	7.73	7.95	8.29	8.51	9.09	9.13	9.04	8.19
16	7.8	8.04	8.44	8.78	9.51	9.7	9.84	8.73
20	7.86	8.14	8.63	9.2	10.24	11	11.85	10.44

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.92	143.3°	4.09
8	40.5°	4.79	146.6°	5.18
10	38.1°	5.29	149.6°	6.08
12	36.9°	5.49	151.2°	6.69
14	36.4°	5.6	148.7°	7.09
16	36.3°	5.67	146.6°	7.56
20	36.4°	5.7	142.8°	9.04

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	5.93	6.98	7.43	7.62	7.73	7.80	7.86
60°	6.23	7.18	7.61	7.83	7.95	8.04	8.14
75°	6.55	7.38	7.75	8.06	8.29	8.44	8.63
90°	6.76	7.60	8.01	8.30	8.51	8.78	9.20
110°	6.55	7.54	8.10	8.61	9.09	9.51	10.24
120°	6.22	7.42	8.05	8.61	9.13	9.70	11.00
135°	5.58	6.95	7.74	8.37	9.04	9.84	11.85
150°	4.72	5.98	7.02	7.71	8.19	8.73	10.44